I would say that it depends.
The Tachihara is a good camera, and a used one is probably worth $460. The reputation for the camera has driven it's price up beyond what I think that the camera is worth. There are other japanese 4x5 cameras of a similar design (for example the Nagaoka) which can often be found for this price.
In my opinion, the pristine condition of the camera is irrelevant. If you are just going to put it on a shelf and admire it, then it is an expensive decorator item, if you are going to use it as a field camera, as it was intended to be used, it won't stay pristine for long.